Cell Site Analysis is the science of being able to locate the geographical area of a phone when calls SMS or downloads are made or received, either in real time or historically. These services are generally used by law enforcement agencies with the purpose of ensuring that a suspect was indeed at the scene of the crime and at the time of the crime. The information provides is generally used for evidential purposes and are supported in courts by expert witnesses.
Cell site analysis is the science of being able to pinpoint a specific position, or positions where a mobile phone was or is.
If a call is made from a mobile phone or a call is received from another phone to the mobile phone in question, or if a SMS is either sent or received then there will be records of this event. Using data from the networks and the skills of the network engineers, mobile phone signal strength readings are take from various locations around the site in question to narrow down exactly where a mobile phone is being used.
How the Masts Work:
Mobile phone telephone masts are generally sited in areas that provide the maximum signal to the locality. They generally transmit in either 1 direction or 3 directions, (360 degrees or ‘sector directed’ degrees). Each section is called as Azimuth. To best determine the radio coverage of these areas, a density map and a single cell predication map will be required, as this helps us understand the RF footprint of the coverage from the mast. If there are many masts in a particular locale, their controller, (a BSC – Base Station Controller), will route them between the most efficient route of onward transmission.
The Route of a Mobile Phone Telephone Call, (or SMS or Download).
BTS Base Transceiver Station
BSC Base Station Controller
MSC Mobile services Switching Centre
VLR Visitor Location Register
HLR Home Location Register
AUC Authentication Register
EIR Equipment Identity Register